Quick-action wrench.



J. JURZYNA.

QUICK ACTION WRENCH.

APPLICATION FILED NOV. 20, 1914.

Patented Feb. 2, 1915.

L h F Qllotncq iosnrn JURZYNA, or CHICAGO, ILLINOIS.

QUICK-ACTION WRENCH.

menace.

Specification of Letters Patent.

Patented Feb. 2, 1915.

Application filed November 20, 1914. Serial No. 873.162.

Z '0 all whom it may concern;

Be it known that 1, Josnrndvpzzrna, a subject of the Emperor of Austria- Iungary, residing atflChicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Quick Action Wrenches, of which the following is a specification. i A v This invention relates to certain new and useful in'iproveinents in quick action Wrench.

lhe primary objectof the device is to provide a wrench in which the jaws may be freely moved slidably relative to each other at will and so as to engage the work and being provided with jaw-tightening means operable for further securing the wrench upon the work. 1

A further object of the lgnvention is to provide a slidable jaw upon the rack of a companion jaw and having a pivotally mounted tensioning means readily shifted out of and into engagement with the said rack.

A still further object is to provide a slidablc jaw upon a jaw shaft and having a rocking tensioning rack-engaging nut nor mally in operative engagement with the rack and provided with a resilient locking means for effecting and retaining such engagement.

v i'ith these general objects in view and others that will appear as the nature of the invention is better understood, the same consists in the novel combination and arrangement of parts to be hereinafter more fully described, illustrated in the accompanying drawings, and then claimed.

in the drawings forming a part of this application and in which like-designating characters refer to corresponding parts throughout the several views, Figure l is a side elevation ofthe device with parts thereof broken away and showing in dottedline the tensioning means as disengaged from the rack. Fig. 2 is a rear elevation thereof partially shown in section. Fig. 3 is a transverse sectional view taken upon line IIIIII of Fig. 1, and Fig. & is a perspective view of the pivoting holder for the tensioning nut separated from the device.

Referring more in detail to the drawings the invention is illustrated in connection with a wrench having one of its jaws 10 provided with a shaft or shank 11 having a concaved toothed rack 12 upon its rear edge while the other jaw 13 of the wrench is slidably mounted upon the said shankin the usual manner by means of upper and lower brackets 14 and 15 respectively through the alining openings 16 and 17 of which the sh nk is positioned.

1 frame 18 of the form illustrated in F 4 has a handle portion 19 pivoted by means of a pin 20 between rearwardly'en tending lugs 21 of the lower bracket 15, while-a cylindrical nut or screw 22is trun' nioned within alining openings in the upper and lower arms 2land 25 respectively of the said bracket, the teeth of which screw are of a form to engage the teeth of the rack 12 whereby upon turning the said screw when so engaged with the rack, the jaws 10 and 13 may be relatively moved.

A leaf-spring 26 is secured to the rear faces of the lugs 21 and normally engages the outer surface 27 of the bracket 18 and resiliently holdsthe screw in engagement with the shank rack. A pin 28 is slidably mounted within a bore 29 of the upper jaw bracket 14 and is provided with an engaging spring 30 within the said bore for normally retaining the pin projected. A closing adjusting screw 31 is provided at the opposite end of the bore from that within which the said pin is mounted, while a bar 32 carried by the bracket 11 and spanning the bore extends through a slot 33 of the pin 28 for limiting the movement of the pins While the spring 26 tends to force the bracket 27 with its screw 22 toward the rack 12, the pin 28 will seat within the top socket or recess 34 of the upper arm 24 of the bracket 18 when the screw is operatively engaged with the said rack. While the spring-pressed pin 28 is sufiicient to retain the operative engagement between the screw and rack when desired to relatively adjust the jaws by turning the said screw, suflicient pressure may be readily exerted upon the thumb plate 35 of the bracket handle 19 to release the engagement of the pin 28 from its socket 34c and thus move the bracket 18 and the screw 22 to its inoperative position as illustrated in dotted lines in Fig. 1. By then releasing the pressure upon the thumb plate 35, the spring 26 will return the bracket 18 and the screw 22 to their operative positions, the upper arm 21 havin a curved beveled cut-away portion 36 which will engage the outer rounded end 37 of the pin 28 when the frame 18 moves toward the rack 12 which will result in a with-drawing movement of the pin 28 allowing the frame 18 to return to its normal position and whereupon the said end 37 of the pin will seat within the socket 34. It will thus be seen that the engagement between the screw and the rack may be readily broken at which time the slidable jaw may be freely movedrelatively to the stationary jaw so as to.engage the work and thereafter the screw 22 may be turned for tightening the jaws upon the work. c

While the form of the invention herein shown and described is what is believed to be the preferred embodiment thereof, it is nevertheless to be understood that minor changes may be made without departing from the spirit and scope of the invention as claimed. 1

What I claim as new is 2-- A wrench comprising in combination with a jaw having a shank extending therefrom and a companion jaw; member slidably mounted-upon said shank, a concaved toothed rack portion at the rear side of said shank, a normally inwardly positioned frame pivoted to said movable jaw, and having a curved beveled cut-away forward portion in the free end thereof, and having a socket therein positioned adjacent to said cut-away portion, a screw journaled in said frame and normally positioned in operative engagement with said toothed rack portion, and a rounded ended springpressed pin carried by said companion jaw and normally positioned within the path of movement of the-adjacent portion of said frame and the said cut-away portion and socket thereof.'

I In testimony WhQIGOfI affix my signature in presence of two witnesses.

- JOSEPH JURZYNA. Witnesses:

EMIL J. GERINGER,

FRANK J. Posvro. 

